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GeForce 9600 GT 1GB vs GeForce GT 640 DDR3

Intro

The GeForce 9600 GT 1GB has core speeds of 650 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR3 memory. It features 64 SPUs as well as 32 Texture Address Units and 16 ROPs.

Compare all that to the GeForce GT 640 DDR3, which makes use of a 28 nm design. nVidia has set the core frequency at 900 MHz. The DDR3 RAM runs at a speed of 1782 MHz on this specific model. It features 384 SPUs as well as 32 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 640 DDR3 65 Watts
GeForce 9600 GT 1GB 95 Watts
Difference: 30 Watts (46%)

Memory Bandwidth

Performance-wise, the GeForce 9600 GT 1GB should theoretically be a bit better than the GeForce GT 640 DDR3 in general. (explain)

GeForce 9600 GT 1GB 57600 MB/sec
GeForce GT 640 DDR3 57024 MB/sec
Difference: 576 (1%)

Texel Rate

The GeForce GT 640 DDR3 will be a lot (more or less 38%) more effective at AF than the GeForce 9600 GT 1GB. (explain)

GeForce GT 640 DDR3 28800 Mtexels/sec
GeForce 9600 GT 1GB 20800 Mtexels/sec
Difference: 8000 (38%)

Pixel Rate

The GeForce GT 640 DDR3 will be a lot (more or less 38%) faster with regards to anti-aliasing than the GeForce 9600 GT 1GB, and should be capable of handling higher resolutions without losing too much performance. (explain)

GeForce GT 640 DDR3 14400 Mpixels/sec
GeForce 9600 GT 1GB 10400 Mpixels/sec
Difference: 4000 (38%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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GeForce 9600 GT 1GB

Amazon.com

Check prices at:

GeForce GT 640 DDR3

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce 9600 GT 1GB GeForce GT 640 DDR3
Manufacturer nVidia nVidia
Year Feb 2008 June 2012
Code Name G94a/b GK107
Memory 1024 MB 2048 MB
Core Speed 650 MHz 900 MHz
Memory Speed 1800 MHz 3564 MHz
Power (Max TDP) 95 watts 65 watts
Bandwidth 57600 MB/sec 57024 MB/sec
Texel Rate 20800 Mtexels/sec 28800 Mtexels/sec
Pixel Rate 10400 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 64 384
Texture Mapping Units 32 32
Render Output Units 16 16
Bus Type GDDR3 DDR3
Bus Width 256-bit 128-bit
Fab Process 65/55 nm 28 nm
Transistors 505 million 1300 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.0 OpenGL 4.2

Memory Bandwidth: Bandwidth is the max amount of information (in units of MB per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce 9600 GT 1GB

Amazon.com

Check prices at:

GeForce GT 640 DDR3

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Comments

2 Responses to “GeForce 9600 GT 1GB vs GeForce GT 640 DDR3”
bernardo lopez says:

I have a 2009 Mac Book Pro that has a GT9600 graphics card. Comparing it to the newer GT640 I wondered if the difference in performance justified the expense in switching. Evidently not. I am mainly into digital graphics and beginning photography.

Antonio says:

Na minha opiniao gt 640 e melhor no geral.

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